Chair



FIG. 1 is an upper left perspective view of my design for a chair;

FIG. 2 is a plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a chair, as shown and described. 